Reamer



A. M. VEDOE.

REAMER. I APPLICATION FILED JANI3| I921.

Patented Aug. 11, 1922.

||| mum I ANTON M. VEDOE, OF QUINCY, MASSACHUSETTS.

REAIVIEB.

enace.

Application filed January 3, 1921.

To all whom it may concern:

Be it known that l, ANTON M. Vnoon, a. subject of the King of Sweden, residing at Quincy, in the county of Norfolk and State of Massachusetts, have invented an Improvement in Reamer-s, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to reamers, and more particularly to a sheet metal member having portions thereof bent to form in. tegral reamer blades.

In the use of reamers in metal working, the cutting blades wear do n and frequently nick or break, and, except in case of breakage, the reamer may be ground to sharpen the blades or obliterate the nicks. Such grinding, however reduces the diameter of the tool so that thereafter it will not cut to the size for which it was originally intended. To obviate this, various constructions have been proposed by which the cutting diameter of the reamer may be adjusted, and while these adjustable or expansible reamers are more or less satisfactory. they are relatively expensive to manufacture.

An important feature of the present in vention, therefore, consists in providing an. expansible reamer which may be quickly and inexpensively produced by forming the sleeve or active part of the reamer of sheet metal having portions thereof struck up to form the reamer blades.

Another feature of the invention consists in means for firmly securing the sheet metal sleeve or active part of the reamer upon the body of the reamer.

Still another feature of the invention consists in striking-up the cutting blades in such a manner that they will be spirally dis posed to increase the smoothness with which the reamer will cut.

The above, and other features of the invention will be clear from the following description in connection with the accompanying drawing, which shows one good practical form of the invention.

In the drawing:

Fig. 1 is a perspective view of an expansible reamer constructed in accordance with the invention, the greater portion of the reamer shank being broken away.

Specification of Letters Patent.

Patented Aug. 1, 1922.

Serial No. 434,469.

Fig. 2 is a longitudinal sectional view of Fig. 1.

, Fig. 3 is a sectional. view taken on line 3-3 of Fig. 2.

Fig. 4 is a plan view showing the inner face of the sheet metal member which forms the sleeve or active part ofthe reamer, the same being shown as it appears before it is bent to conform to the body of the reamer.

Fig. 5 is a transverse sectional view showing a modification of the invention.

The reamer illustrated has a shank 10 in tegral with the seat or body 11, upon which the sleeve or active part 12 of the reamer is mounted. The body 11 is preferably tapered towards its front end as shown in Fig. 2, and the sleeve 12 is correspondingly tapered and is constructed to be expanded upon being forced along the tapered body 11, but this is not an essential feature of the invention since in certain constructions it may be desirable to make the reamer non-expansible and to discard the sleeve 12 for a new one when it wears down or becomes dull.

The sleeve or active part 12 of the reamer is formed of sheet metal having suflicient thickness to furnish the requisite strength and stiffness to the blades 13 which are struck up from the sheet metal. The sleeve 12 may be readily stamped out from sheet metal to form a blank as shown in F ig. 4. In this view it will be, noted that the upper and lower edges of the blank are not parallel but that theytaper to the right, in order that when the blank is bent to conform to the body 11, it will form. a tapered sleeve as shown in Figs. 1 and 2.

The reamer blades 18 may be formed by producing slits 14 in the sheet metal blank extending generally transversely thereof and terminating short of the sides of the blank, and the metal to one side of the slits is struck or bent up as shown. it is desirable that the cutting face of the reamer shall have the same diameter throughout a substantial portion of the sleeve 12, but since the sleeve, in the embodiment shown, is tapered, it is necessary that the distance that each blade is struck up from the face of the sheet metal be increased as it approaches the front end of the reamer. This will be apparent from the drawing where it will be seen that the blades 13 are bent up from the sleeve to a greater extent at 5 than at a. Bending along the tapering body 01' seat 11.

the blades up to a greater extent at one end thereof than atthe other, has the desirable ellect of giving the blades a slight spiral configuration as shown, since as a blade is raised, its cutting edge recedes from the plane of the slot ll. This spiral arrangement is desirable as it increases the smoothnose with which the reamer will out.

In order that the reamer may be expanded from time to time as the same becomes worn, provision is madefor adjusting theTsleeve In the embodiment of the invention illustrated, the opposite ends of the body 11 are threaded as at 15 to receive correspondingly threaded nuts 16. These nuts engage the opposite ends of the sleeve 12, and by backing ell one nut andtightening up the other, the sleeve may be forced along the body 11 to the desired position. The nuts 16 preferably serve also to contract the sleeve intofirm engage ment with the body 11, and to this end, the inner face of the nuts 16 are undercut as at 17 to receive the correspondingly beveled ends of thesleeve 12 asclearly shown. The nuts 16 are preferably provided with fiattened wrench receiving faces 18.

The sleeve 12 should be prevented from rotating about the body 11, and to this end, in the present instance thebody 11 has a longitudinally extending key-way 19 adapted to slidingly' receive a key 20 formed upon the blank or sleeve 12 by bending inwardly a marginal end portion 01: the blank as shown. The forward ends of the blades 13 are preferably tapered as at21 in order that the reamer will readily enter the hole to be reamed.

In some embodiments of the invention it may be desirable to form the sleeve or active portion 12 of the reamer from more than one sheetmetal blank, and in Fig. 5 a modification is shown in which each sheet metal blank extends but half-way around the body 11 instead of substantially entirely around the body as in Figs. 1, 2 and 3. The constructio-n shown in Fig- '5 differs from that shown in Figs. 1 to 4-, in that the body 22 is provided with opposite"key-ways, and each curved blank 23 extends approximately halfway aroundnthe body 22 and has a key 24 entering one of the key-ways. In other respects the construction shown in Fig. 5 may be similarto that shown in Figs. 1 to l.

By forming the sleeve or active part of the reamer of sheet metal which maybe readily stamped out and bent to the desired configuration, the same may be quickly and in expenslvely produced, "and when the sleeve becomes worn or dull, it may be readilyremoved'and ground, and then adjusted upon the body 11 to the desired diameter. In some cases, due to the'low cost at which the sleei e 12 -c-an be produced, it may be desirable ts discard thesame tor -anew one when 1 ,eeanee upon the reamer body.

2. A reamer comprising, in combination, a reamer body, a sleeve surrounding the body and formed of a sheet metal blank having slits extending transver-sely'of the blank and themetal cutby said slits being struck-"up to form ream-er cutting blades, the blank bei-ng bent lengthwise to convert it into a sleeve, and means for securing the sleeve upon the reamer body,

, 3. A reamer comprising, in combination, a tapered reamer body, a sleeve having a tapered inner surface embracing the body and formed of a sheet metal 'bla-nk'having portions struck-up transversely of the blank to form reamer cutting blades, the blank being bent lengthwise to convert it into a sleeve, and means for securing the sleeve adj ustably upon the reamer body.

l. A reamer comprisingfln combination, a reamer body having a key-way extending lengthwise thereof, a sleeve surrounding the body and formed of a sheet metal blank having portions struck-up transversely of the blank to form reamer cutting blades and having an end marginal edge bent inwardly to form a key enterin the key-way, the blank being bent lengthwise to convert it into a sleeve, and means for securing the sleeve upon the reamer body.

5. A reamer comprising, in combination, a substantially cylindrical reamer body having a key-way extending lengthwise thereof, a cutter member upon the body formed of a sheet metal blank ha ving portions struck-up transversely of the blank to form reamer cutting blades and "having an end marginal edge bent to form a key entering the key way, the blank being bent lengthwise to conform to the curvature of said body, and means for securing the cutter member upon the reamer body.

6. A reamer comprising, in combination, a substantially cylindrical reamer body, a cutter member upon the body formed of asheet metal blank having portions struck-up transversely of the blank to form reamer cutting blades, the blank being bent lengthwise to conform to the curvature of said body, and means for securing the cutter transversely of the blank, and the metal cut by said slits being raised an increasing dis tance along the length of the slits from the body of the sleeve and moved rearwardly as it is raised to form spiral cutting blades, the blank being bent lengthwise to convert it into a sleeve, and means for securing the sleeve upon the lreanier body.

8. A reamer comprising, in combination, a reamer body, a sleeve surrounding the body and formed of a sheet metal blank having slits extending transversely of the blank but terminating short of the opposite sides of the blank and the metal cut by said slits being struck up to form reamer cutting blades,

&

the blank being bent lengthwise to convert it into a sleeve, and means for securing the sleeve upon the reamer body.

9. A reamer comprising, in combination, a substantially cylindrical reamer body, a sleeve formed 01"- sheet metal bent to embrace the reamer body, the sleeve having slits extending longitudinally thereof and having the metal upon one side of the slits struckup to term reamer cutting blades, and means for securing the sleeve upon the reamer body.

In testimony whereof, I have signed my name to this specification.

ANTON M. VEDOE. 

